Why Are My Bode Plot Results in MATLAB Different from LTSPICE?

[samdunhamss]

Homework Statement

I'm working on a Lab for my Electronics Course and need to use MATLAB to create a Bode Plot to get the data for my theoretical Magnitudes at frequencies between 50Hz and 500 Hz. The Resistor has a value of 1k and the Capacitor has a value of 1uF.
I need one for both a high and low pass filter.

Homework Equations

I believe the transfer functions are
H= 1/(s*RC + 1) for the lowpass
and
H= s*RC/(RC*s+1)

The Attempt at a Solution

The MATLAB code I use
s=tf('s');
RC = .000001*1000;
H=1/(RC*s+1);
h=s*RC/(1+RC*s);
W=[50:50:500];
[MAG,PHASE] = bode(H,W);
[MAG,PHASE] = bode(h,W);
Now these are done in real time, not in a .m file.
The problem is that the values are nothing what I expected. When I mess around with the circuit in Transient Analysis in LTSPICE I get values close to what I need, but not in a convenient list form like I would prefer. I think my problems in MATLAB arise somewhere in my transfer functions.
If it's of any consequence the input signal is a simple sine wave with an amplitude of 1V.

 

[KataKoniK]

Hello, thank you for sharing your progress on your lab project. It seems like you have a good understanding of the transfer functions for both the high and low pass filters. However, I would recommend double checking your values for RC and making sure they are in the correct units. It's also possible that there may be some small errors in your MATLAB code that are affecting the results. I suggest trying out different values for RC and also checking your code for any mistakes. Additionally, it may be helpful to plot the theoretical magnitude values alongside the values obtained from LTSPICE to see where the discrepancies lie. Good luck with your project!